Power Supply - GE B30 Technical Reference Manual

Frame

2.3 Power supply

The menu shows the voltages and temperature
measured by the DC/DC board and CPU board. The
values in the column under Mean are the mean
values of last one second, the Min column shows
the minimum mean value, and the Max column the
maximum mean value of the voltages and
temperature measured during the current power
ON.
The voltages and currents are measured by the
DC/DC Board, except the four lowest under
heading CPU Board A/D, which are measured by
the CPU Board. +5V and +3.3V values come thus
both from the DC/DC Board and CPU Board.
System power and Module power are calculated
by the DC/DC Board.
Voltages
ACDC AC/DC converter's output voltage, used as monitor
input voltage when the mains cord is connected. Range
when present: 15.25...16.55V (Note: this includes the
measurement inaccuracy).
EXTDC External DC input voltage, can be used as monitor input voltage when present, if the mains cord is not
connected. Range when present: 10...16.5V
Bat1 Battery A voltage measured at DC/DC Board. Range 9...12.6V for Li-ION battery
Bat2 Battery B voltage measured at DC/DC Board. Range 9...12.6V for Li-ION battery
VSYS System voltage at DC/DC Board. This is the monitor input voltage measured at the DC/DC Board after input
voltage selection. Range 9...16.5V.
VBOOST Boost converter's output voltage at DC/DC Board. Boost converter's input is VSYS, which is raised to a
higher level for module bus voltage and battery charging, if needed. Range 14...16V.
VMOD Supply voltage for modules. VBOOST is fed through a circuit breaker to VMOD. Range 13.8...16V.
I/O_VMOD Module bus supply voltage that can be connected to Multi I/O Connector at the rear of the monitor.
Connecting depends on the DC/DC Board software. Range when connected: 13.8...16V
+5V At DC/DC Board. Range 4.8...5.3V.
+3.3V At DC/DC Board. Range 3.15...3.45V.
Currents
Mod Current Current from module bus voltage VMOD. Depends on the module configuration.
SYS Current Current from system voltage VSYS. Depends on the system configuration and battery charging.
Bat current Current from or to the battery selected (discharge or charge). Measured at DC/DC Board. Depends on
the system configuration and battery charging.
Powers
System power Power from VSYS, calculated by DC/DC Board software. System power = VSYS * SYS Current
Module power Power from VMOD, calculated by DC/DC Board software. Module power = VMOD * Mod Current
Temp
Power TempPower supply unit temperature, measured at DC/DC Board.
Therm Not CHGThis is subject to change.
Dummy CHGThis is subject to change.
CPU Board A/D
CPU TempTemperature measured at CPU Board.
VSYS_OUTVSYS that is connected to CPU Board and Backlight Inverter by a FET.
Measured at CPU Board. Range 9...16.5V.
+3.3VMeasured at CPU Board. Range 3.15...3.45V.
+5V Measured at CPU Board. Range 4.75...5.25V.
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Document no. 2044677-001